The traditional, flat base design of the Pro-Hunter has been skillfully blended with Sierra’s world-famous accuracy. The custom-tapered Pro-Hunter jacket design helps assure maximum expansion, optimum weight retention and deep penetration for game-stopping, 1-shot performance. This 180 Grain Pro-Hunter is an excellent choice for medium to large game in larger .311 caliber rifles such as the 303 British, 7.7mm Arisaka, and the 7.65mm Mauser. This is not loaded ammunition.